code: def test_refutation_placebo_refuter_category_non_consecutive_index(
      self, error_tolerance, estimator_method, num_samples
  ):
      refuter_tester = SimpleRefuter(
          error_tolerance, estimator_method, "placebo_treatment_refuter"
      )
      data = dowhy.datasets.linear_dataset(
          beta=10,
          num_common_causes=1,
          num_instruments=1,
          num_samples=num_samples,
          treatment_is_binary=False,
          treatment_is_category=True,
      )
      random_index = random.sample(
          range(1, 10 * num_samples), num_samples
      )
      data["df"].index = random_index
      refuter_tester.null_refutation_test(data=data)
  
file_path: dowhy/tests/causal_refuters/test_placebo_refuter.py
imports: import random
  from pytest import mark
  import dowhy.datasets
  from .base import SimpleRefuter
label_desc: Use image node_id 4 for calling the TestPlaceboRefuter obj's underlying member method code with example usage: obj.test_refutation_placebo_refuter_category_non_consecutive_index(error_tolerance, estimator_method, num_samples) without return types